JPH0759285A - Electrical connection plate of motor and, motor - Google Patents

Abstract

PURPOSE:To connect a stator easily and to prevent disconnection, etc., on resin forming by overlapping a conductive layer with a coil connection part for connecting the lead wire of a fixed coil and an external connection part for connecting an external terminal and an insulation layer. CONSTITUTION:Pins 18U-18W connected to a three-phase coil 44 and pins 36U-36W for neutral point are allowed to protrude vertically on the upper surface of a stator 40. Also, a socket 46 constituting an external connection terminal is mounted to the stator 40. Then, connection plates 12U-12W consisting of a conductive layer 14 and an insulation layer 16 are overlapped and adhered by an adhesive, thus forming an electrical connection plate 10. In this case, protruding pieces 22U-22W are laid out in parallel. Then, a connection plate 10 is laid out on the stator 40 so that each pin 18 is engaged to the connection hole and a protruding piece 22 is engaged to a socket 46. A connection plate 30 for neutral point is similarly laid out on the stator 40. Then, after each pin 18 and the conductive layer 14 are fixed by soldering 74, the stator 40 is molded along with the connection plates 10 and 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator of an electric motor.

[0002]

2. Description of the Related Art Conventionally, as a method of connecting coils wound around a stator of an electric motor, a PC board, which is an expensive material, is wired with copper foil or the like for connection. That is, the lead wire from the coil of the stator is connected to the PC board, and the connection point to the connection terminal to the outside is connected by the copper foil. This allows a PC on the stator
Wiring could be done easily just by mounting the board.

[0003]

However, according to the above method, the PC board is deformed or cracked or the copper foil portion is broken due to the pressure during resin shaping, that is, molding of the stator, which is a defect. May have occurred.

Therefore, in view of the above problems, the present invention provides an electric connection plate and a motor for an electric motor, in which the stator can be easily electrically connected and the disconnection does not occur even if resin molding is performed.

[0005]

According to a first aspect of the present invention, there is provided an electric connecting plate for an electric motor, wherein a coil connecting portion for connecting a lead wire of a coil of a stator and an external connecting portion for connecting an external terminal. And an insulating layer laminated on the conductive layer.

According to a second aspect of the present invention, an electric connection plate according to the first aspect is provided for each lead wire, the plurality of electric connection plates are stacked, and external connection portions are centrally arranged at one location. The laminated electric connection plates are attached to the stator.

[0007]

According to another aspect of the electric connecting plate of the electric motor of the present invention, a conductive layer having a coil connecting portion for connecting a lead wire and an external connecting portion for connecting an external terminal is laminated with an insulating layer. With this structure, the wiring can be formed by stacking a plurality of layers, and it is not necessary to carry out the wiring only at a necessary portion with a copper foil or the like unlike a PC board.

According to another aspect of the electric motor of the present invention, an electric connection plate in which a conductive layer and an insulating layer are stacked is provided for each lead wire, and a plurality of these electric connection plates are stacked to concentrate externally at one location. Arrange the connections and attach to the stator. Therefore, the stator can be easily electrically connected, and the electric connection plate is not deformed or broken even when it is molded with the molding resin.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The structure of the electric connection plate 10 for making the air connection of the coils of the stator of the electric motor will be described. This electric connection plate 10 includes a stator 4 including three phases of U phase, V phase and W phase.
The coil 44, which is a lead wire drawn from 0, is connected.

Reference numeral 12U is a U-phase connecting plate having a planar arc shape. This is a conductive layer 1 made of copper or brass
It has a two-phase structure of 4U and an insulating layer 16U made of resin. In addition, a connection hole 20U to which a pin 18U to which a U-phase coil drawn from the stator is connected is provided at this one end, and at the other end, a connection hole 20U for electrical connection with the outside is provided. A U-phase protruding piece 22U is provided. Further, the pins 18V and 18W to which the V-phase coil and the W-phase coil are connected are inserted, and escape holes 24V and 24W having large opening areas are formed so as not to make electrical contact with the U-phase connection plate 12. It is provided (see FIGS. 1 and 2).

Reference numeral 12V is a V-phase connecting plate having a plane arc shape. This is composed of a conductive layer 14V and an insulating layer 16V, and is a pin 1 electrically connected to the V-phase coil of the stator.
It has a connection hole 20V to which 8V is electrically connected, and a V-phase projecting piece 22V projects. In addition, the escape holes 26U, 2
6W is provided (see FIGS. 3 and 4).

Reference numeral 12W is a W-phase connecting plate having a planar arc shape. This is composed of a conductive layer 14W and an insulating layer 16W, and is a pin 1 electrically connected to the W-phase coil of the stator.
8W has a connection hole 20W to be electrically connected, and a W-phase projecting piece 22W is provided. In addition, the escape hole 28U,
28 W is also provided (see FIGS. 5 and 6).

Reference numeral 30 is an arc-shaped neutral point connecting plate. This is composed of the conductive layer 32 and the insulating layer 34, and the pins 36U, 36V, 36W to which the connection ends for the neutral points of the U-phase, V-phase and W-phase coils of the stator are electrically connected are ,
Connection holes 38U, 38V, 38W that are electrically connected are provided (see FIGS. 7 and 8).

Next, the four connecting plates 12U, 12 having the above construction
A case where the coils of the stator 40 are wired using V, 12 W, and 30 will be described.

(1) In the stator 40, an iron core 42 is premolded with a resin, and a three-phase coil 44 is wound around it. Then, when the pre-molding is performed, the stator 40
The pins 18 connected to the three-phase coils 44 respectively
Pins 36U, 36 for U, 18V, 18W and neutral point
V and 36 W are projected vertically on the upper surface of the stator 40. The protruding position of these pins is set to a position at the minimum distance from each coil 44. Further, when performing the pre-molding, the socket 46 made of synthetic resin, which constitutes the external connection terminal, is attached to the stator 40 in advance. The socket 46 is composed of a main body 46a and a lid 46b thereof, and a recess 48 is provided in the main body 46a so that the protruding piece 22 fits therein. The connection plates 12U, 12V, 12
Connection hole 38 and escape hole 24 provided in W and 30,
26 and 28 are opened at the positions where these pins are inserted.

(2) Three connecting plates 12U, 12V, 12
The Ws are stacked so that the insulating layers 16 become boundaries with each other and fixed with an adhesive (see FIG. 10). In this case, the three protruding pieces 22 are arranged in parallel (see FIG. 9), and the protruding pieces 22U remain straight so that the three protruding pieces 22 are in the same plane. It is bent slightly upward, and the protruding piece 22W is also bent upward (see FIG. 9).

(3) The electric connecting plate 10 in which three connecting plates 12 are stacked is arranged so that the pins 18 and the connecting holes 20 are fitted together.
In addition, the protruding piece 22 is arranged on the stator 40 so as to fit into the recess 48 of the socket 46. Also, the neutral point connection plate 3
0 is also arranged on the stator 40 so that the pin 36 is located at the position of the connection hole 38. Then, each pin 18 ... And the conductive layer 14
And are fixed with soldering 74.

(4) Attach the lid 46b of the socket 46 to the main body 46
cover a.

(5) The stator 40 is molded together with the electric connection plate 10 and the neutral point connection plate 30.

With the electric connecting plate 10 having the above-mentioned structure, wiring can be performed by simply mounting the three-phase connecting plate 12 and the neutral point connecting plate 30 on the stator, so that the wiring operation is very simple. . Further, even if molding is performed on this, since the entire upper surface of the connecting plate 12 is the conductive layer 14, no breakage occurs even if the electrical connecting plate 10 is slightly deformed, and three connecting plates 12 are stacked. Therefore, deformation is unlikely to occur.
Since the conductive layer 14 is made of copper or brass and the insulating layer 16 is made of resin, it is not necessary to use an expensive material and the cost is reduced. Since the conductive layer 14 has a plate shape, the current density is low, the connection resistance is small, and the loss is small. Therefore, it can be applied to use of low voltage and large current. By stacking the multi-layer connection plates 12, a jumper process is unnecessary and high quality is achieved.

Next, a method of manufacturing the connecting plate 12 will be described (see FIGS. 18 and 19).

A resin is attached to the strip-shaped copper plate 50, or spray coating is applied to the strip-shaped copper plate 50, so that the conductive layer 14 and the insulating layer 1 are formed.
6 is formed.

[0024] A mold is obtained by cutting, extracting, squeezing, bending, etc. in an arc shape with a mold.

The protruding piece 22 is bent into a predetermined shape.

The insulating layer 16 is formed on the back surface of the protruding piece 22.
Therefore, as shown in FIGS. 20 and 21, the resin 52 is not applied to the position corresponding to the protruding piece 22,
You may provide only the copper plate 50.

Next, a method of attaching the electric connection plate 10 and the stator 40, in which the three connection plates 12 are stacked, will be described.

(1) First method (see FIG. 22) When the stator 40 is premolded, a protrusion 54 is formed on the upper surface thereof.
Is provided. In addition, the electric connection plate 10 is provided with a corresponding through hole 56. Then, after inserting the through-hole 56 into the protrusion 54, the tip of the protrusion 54 is heat-pressed to prevent the electric connection plate 10 from being pulled out.

(2) Second method (see FIG. 23) When pre-molding the stator 40, the fixing wall 58 is made to protrude along the outer diameter of the electric connecting plate 10, and the electric connecting plate 10 is It is attached by press fitting between the fixed walls 58.

(3) Third method (see FIG. 24) This is a method of fixing three connecting plates 12, but each connecting plate 1
2 are provided with through holes 60, and rivet caulking 62 is inserted into these through holes 60 to fix the three connecting plates 12. In this case, a collar 64 is arranged between the connecting plate 12 and the rivet caulking 62.

(4) Fourth method (see FIG. 25) When pre-molding the stator 40, the rivet caulking 66 is fixed on the upper surface thereof. Then, a through hole 68 is provided at a position of the electric connection plate 10 corresponding to the position of the rivet crimp 66, and the rivet crimp 66 is inserted through the through hole 68.
, And the three connection plates 12 are fixed, and the electric connection plate 10 is fixed to the stator 40.

(5) Fifth method (see FIG. 26) Instead of the soldering 74, after inserting the pin 18 into the connection hole 22, the push nut-shaped washer 70 is attached to the pin 1.
8 is press-fitted and fixed to the electric connection plate 10 and the stator.

By the way, in the electric connection plate 10, the escape hole 24 is provided so that the pin 18 of each phase does not electrically contact with the conductive layer 14 of another phase. When it is desired to increase the diameter, as shown in FIG. 27, the diameter of the escape hole 24 may be increased, or the escape hole 24 located on the uppermost surface may be bent upward at the peripheral edge to maintain the insulation distance. Good (see FIGS. 27 to 31).

In the electric connecting plate 10 having the above-mentioned structure, the connecting plate 12 and the coil 44 of the stator 40 are electrically contacted by the pin 18, but instead of this, each connecting plate 12 is connected.
Protruding pieces 72U, 72V, 72W for winding the coil 44 are provided from U, 12V, 12W.
The coils 44 may be respectively wound around and connected to the 2 (see FIGS. 32 to 35).

The electric connecting plate 10 has an arcuate shape or a ring shape in plan view, but this shape changes variously depending on the position of the coil 44 drawn out from the stator 40, and is described in the above embodiment. The shape is not limited.

According to the method of manufacturing the electrical connection board 10 described above,
Since the process is a punching process, the electric connection board 10 can be easily manufactured without requiring a complicated process such as a PC board.

[0037]

As described above, the electric connecting plate of the electric motor of the present invention has the following effects.

It is easy to electrically connect the ends of the coil.

When the stator is molded, disconnection or the like due to molding pressure is unlikely to occur.

Since it can be manufactured without using an expensive material, the cost can be reduced.

Since it can be simply manufactured by a punching process,
The manufacturing method is easy.

Since the wiring has a plate-shaped conductive layer, the current density is low, the connection resistance is low, and the loss is small. Therefore, it can be applied to use of low voltage and large current.

By stacking in multiple phases, jumper processing is unnecessary and high quality is achieved.

[Brief description of drawings]

FIG. 1 is a plan view of a U-phase connecting plate.

FIG. 2 is a vertical sectional view of a U-phase connecting plate.

FIG. 3 is a plan view of a V-phase connecting plate.

FIG. 4 is a vertical cross-sectional view of a V-phase connecting plate.

FIG. 5 is a plan view of a W-phase connecting plate.

FIG. 6 is a vertical cross-sectional view of a W-phase connecting plate.

FIG. 7 is a plan view of a neutral point connection plate.

FIG. 8 is a vertical cross-sectional view of a neutral point connection plate.

FIG. 9 is a plan view of an electric connection plate.

FIG. 10 is a vertical cross-sectional view showing a state in which a pin is inserted into a connection plate in which three sheets are stacked.

FIG. 11 is a vertical cross-sectional view showing a state in which a pin is inserted into the neutral point connection plate.

FIG. 12 is a plan view showing a state where an iron core is pre-molded.

FIG. 13 is a side view of the same.

FIG. 14 is a plan view showing a state where an electric connection plate is attached to the stator.

FIG. 15 is a side view of the same.

FIG. 16 is a plan view of the stator with the socket closed.

FIG. 17 is a side view of the same.

FIG. 18A is a plan view of a strip-shaped copper plate. (B) Similarly, it is a longitudinal cross-sectional view.

FIG. 19 (a) is a plan view of a punched connection plate. (B) Similarly, it is a longitudinal cross-sectional view.

FIG. 20 (a) is a plan view of a copper plate according to the second method. (B) Similarly, it is a longitudinal cross-sectional view.

FIG. 21 (a) is a plan view of a punched connection plate. (B) Similarly, it is a longitudinal cross-sectional view.

FIG. 22 is a first method of attaching the electric connection plate and the stator.

FIG. 23 is also the second method.

FIG. 24 is also the third method.

FIG. 25 is also the fourth method.

FIG. 26 is also the fifth method.

FIG. 27 is a vertical cross-sectional view of an electrical connection plate in which an insulation distance between a relief hole and a pin is increased.

FIG. 28 is a plan view of the U-phase connection plate when the insulation distance is increased.

FIG. 29 is a plan view of the V-phase connecting plate.

FIG. 30 is a plan view of the W-phase connecting plate.

FIG. 31 is a plan view in which three connecting plates are stacked when the insulation distance is large.

FIG. 32 is a plan view of a U-phase connection plate having a structure in which a coil is wound.

FIG. 33 is a plan view of the V-phase connecting plate.

FIG. 34 is a plan view of the W-phase connecting plate.

FIG. 35 is a plan view of the same in which three connecting plates are stacked.

[Explanation of symbols]

 10 Electrical Connection Plate 12 Connection Plate 14 Conductive Layer 16 Insulating Layer 18 Pin 20 Connection Hole 22 Projecting Pieces 24, 26, 28 Escape Hole 30 Neutral Point Connection Plate 32 Conductive Layer 34 Insulating Layer 36 Pin 38 Connection Hole 40 Stator

Claims (2)

[Claims] 1. A conductive layer having a coil connecting portion for connecting a lead wire of a coil of a stator, an external connecting portion for connecting an external terminal, and an insulating layer laminated on the conductive layer. An electric connection board for an electric motor, which is characterized in that 2. The electric connection board according to claim 1, provided for each lead wire, wherein a plurality of the electric connection boards are laminated and external connection portions are centrally arranged at one place, and the electric connection board is laminated. An electric motor characterized in that a stator is attached to the stator.